A psychologist was interested in gauging the success of a mood manipulation during one of her experiments. She had three groups of participants who underwent different types of mood induction: disgust mood induction, negative mood induction and positive mood induction. After the mood induction, participants were asked to endorse nine statements relating to their mood (on a 5-point Likert scale from 1 = disagree to 5 = agree): (1) When you're smiling the whole world smiles with you, (2) I love the pretty flowers, (3) I could never touch a dead body, (4) I would never eat catfood, (5) If someone served me monkey brain soup I would vomit, (6) I feel fed up, (7) Bodily fluids are nasty, (8) I could not drink from a glass that I'd used to catch a spider, (9) I am a worthless piece of scum.
- What analysis should be done to see if the mood inductions had an effect on responses to these nine items?
A)Factor analysis
B)Repeated-measures ANOVA
C)MANOVA
D)Mixed ANOVA

Question

Quizplus · Accepted Answer

MANOVA (Multivariate Analysis of Variance) is appropriate here because it allows for the examination of the effect of the independent variable (mood induction type) on multiple dependent variables (responses to the nine statements) simultaneously. This is useful for assessing the overall effect of mood induction across all items, considering potential correlations between them.

A Psychologist Was Interested in Gauging the Success of a Mood